Glenn Guntenspergen, Ph.D.
Glenn is a Research Ecologist at the Eastern Ecological Science Center in Laurel, MD.
Science and Products
Filter Total Items: 14
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Filter Total Items: 119
Fine-scale spatial variation in plant species richness and its relationship to environmental conditions in coastal marshlands
Previous studies have shown that variations in environmental conditions play a major role in explaining variations in plant species richness at community and landscape scales. In this study, we considered the degree to which fine-scale spatial variations in richness could be related to fine-scale variations in abiotic and biotic factors. To examine spatial variation in richness, grids of 1 m2 plot
Authors
J.E. Mancera, G.C. Meche, P.P. Cardona-Olarte, E. Castaneda-Moya, R.L. Chiasson, N.A. Geddes, L.M. Schile, H.G. Wang, G.R. Guntenspergen, J.B. Grace
Using hydrogeomorphic criteria to classify wetlands on Mt. Desert Island, Maine – Approach, classification system, and examples
A wetland classification system was designed for Mt. Desert Island, Maine, to help categorize the large number of wetlands (over 1,200 mapped units) as an aid to understanding their hydrologic functions. The classification system, developed by the U.S. Geological Survey (USGS), in cooperation with the National Park Service, uses a modified hydrogeomorphic (HGM) approach, and assigns categories bas
Authors
Martha G. Nielsen, Glenn R. Guntenspergen, Hilary A. Neckles
Influence of weather extremes on the water levels of glaciated prairie wetlands
Orchid Meadows is a long-term wetland research and monitoring site on the Coteau des Prairie in extreme east-central South Dakota, USA. It is a 65-ha Waterfowl Production Area with numerous temporary, seasonal, and semi-permanent wetlands. Ground water and surface water have been monitored at the site from 1987 to 1989 and from 1993 to the present. Vegetation has been monitored since 1993. The
Authors
W.C. Johnson, S.E. Boettcher, K.A. Poiani, G. Guntenspergen
The Blackwater NWR inundation model. Rising sea level on a low-lying coast: land use planning for wetlands
The Blackwater National Wildlife Refuge (BNWR), on the Eastern Shore of Chesapeake Bay (figure 1), occupies an area less than 1 meter above sea level. The Refuge has been featured prominently in studies of the impact of sea level rise on coastal wetlands. Most notably, the refuge has been sited by the Intergovernmental Panel on Climate Change (IPCC) as a key example of 'wetland loss' attributable
Authors
Curt Larsen, Inga E. Clark, Glenn Guntenspergen, Don Cahoon, Vincent Caruso, Cliff Hupp, Tom Yanosky
Seasonal methane emissions by diffusion and ebullition from oligohaline marsh environments in coastal Louisiana
Methane is an important atmospheric greenhouse gas that is emitted from many natural and anthropogenic sources. In order to evaluate the global methane budget, precise data are needed from the diverse sources including coastal wetlands. Over 100 time-series determinations of methane emissions from an oligohaline wetland (brackish marsh) in coastal Louisiana show large variability during five seaso
Authors
Joel S. Leventhal, Glenn R. Guntenspergen
Differences in distribution of modified basins and ducks relative to roadside transects
Wetland basins in the Prairie Pothole Region of the U.S. are commonly modified by excavation (e.g., roadside ditches, stock dugouts), partial drainage (ditching), and diking. Differences in the distribution of modified wetlands may affect the predictive accuracy of waterfowl survey data if such wetlands are not distributed randomly in the landscape and if waterfowl are not distributed equally am
Authors
Jane E. Austin, Glenn R. Guntenspergen, H. Thomas Sklebar, T.K. Buhl
Preface: Phragmites australis: A sheep in wolf's clothing?
A. problem with national priorities for control or prevention of aquatic nuisance species is that we often do not know the full extent of the problem, if there is one. To address this issue, we hosted a technical forum and workshop-Phragmites australis: A Sheep in Wolf's Clothing?--with a focus on new research and critical reviews that address the role of Phragmites as a noxious weed. ... The Wor
Authors
M.P. Weinstein, J.R. Keough, G.R. Guntenspergen, S.Y. Litvin
An integrated analysis of the effects of past land use on forest herb colonization at the landscape scale
A framework that summarizes the direct and indirect effects of past land use on forest herb recolonization is proposed, and used to analyse the colonization patterns of forest understorey herbaceous species in a 360-ha mixed forest, grassland and arable landscape in the Dijle river valley (central Belgium).Fine-scale distribution maps were constructed for 14 species. The species were mapped in 15
Authors
K. Verheyen, Glenn R. Guntenspergen, B. Biesbrouck, M. Hermy
Preface: Phragmites australis - A Sheep in Wolf's Clothing?
[No abstract available]
Authors
M.P. Weinstein, J.R. Keough, G.R. Guntenspergen, S.Y. Litvin
Narrowing historical uncertainty: probabilistic classification of ambiguously identified tree species in historical forest survey data
Historical data have increasingly become appreciated for insight into the past conditions of ecosystems. Uses of such data include assessing the extent of ecosystem change; deriving ecological baselines for management, restoration, and modeling; and assessing the importance of past conditions on the composition and function of current systems. One historical data set of this type is the Public L
Authors
D.J. Mladenoff, S.E. Dahir, E.V. Nordheim, L.A. Schulte, G.R. Guntenspergen
Indicators of wetland condition for the Prairie Pothole Region of the United States
We describe a study designed to evaluate the performance ofwetland condition indicators of the Prairie Pothole Region (PPR)of the north central United States. Basin and landscape scaleindicators were tested in 1992 and 1993 to determine theirability to discriminate between the influences of grasslanddominated and cropland dominated landscapes in the PPR. Pairedplots were selected from each of the
Authors
Glenn R. Guntenspergen, S.A. Peterson, S.G. Leibowitz, L.M. Cowardin
Duck populations as indicators of landscape condition in the Prairie Pothole Region
The Prairie Pothole Region of the northern Great Plains is an important region for waterfowl production because of the abundance of shallow wetlands. The ecological significance of the region and impacts from intensive agriculture prompted the U.S. Environmental Protection Agency to select it as one of the first areas for developing and evaluating ecological indicators of wetland condition. We exa
Authors
Jane E. Austin, Thomas K. Buhl, Glenn R. Guntenspergen, Wayne Norling, H. Thomas Sklebar
Science and Products
Filter Total Items: 14
No Result Found
Filter Total Items: 119
Fine-scale spatial variation in plant species richness and its relationship to environmental conditions in coastal marshlands
Previous studies have shown that variations in environmental conditions play a major role in explaining variations in plant species richness at community and landscape scales. In this study, we considered the degree to which fine-scale spatial variations in richness could be related to fine-scale variations in abiotic and biotic factors. To examine spatial variation in richness, grids of 1 m2 plot
Authors
J.E. Mancera, G.C. Meche, P.P. Cardona-Olarte, E. Castaneda-Moya, R.L. Chiasson, N.A. Geddes, L.M. Schile, H.G. Wang, G.R. Guntenspergen, J.B. Grace
Using hydrogeomorphic criteria to classify wetlands on Mt. Desert Island, Maine – Approach, classification system, and examples
A wetland classification system was designed for Mt. Desert Island, Maine, to help categorize the large number of wetlands (over 1,200 mapped units) as an aid to understanding their hydrologic functions. The classification system, developed by the U.S. Geological Survey (USGS), in cooperation with the National Park Service, uses a modified hydrogeomorphic (HGM) approach, and assigns categories bas
Authors
Martha G. Nielsen, Glenn R. Guntenspergen, Hilary A. Neckles
Influence of weather extremes on the water levels of glaciated prairie wetlands
Orchid Meadows is a long-term wetland research and monitoring site on the Coteau des Prairie in extreme east-central South Dakota, USA. It is a 65-ha Waterfowl Production Area with numerous temporary, seasonal, and semi-permanent wetlands. Ground water and surface water have been monitored at the site from 1987 to 1989 and from 1993 to the present. Vegetation has been monitored since 1993. The
Authors
W.C. Johnson, S.E. Boettcher, K.A. Poiani, G. Guntenspergen
The Blackwater NWR inundation model. Rising sea level on a low-lying coast: land use planning for wetlands
The Blackwater National Wildlife Refuge (BNWR), on the Eastern Shore of Chesapeake Bay (figure 1), occupies an area less than 1 meter above sea level. The Refuge has been featured prominently in studies of the impact of sea level rise on coastal wetlands. Most notably, the refuge has been sited by the Intergovernmental Panel on Climate Change (IPCC) as a key example of 'wetland loss' attributable
Authors
Curt Larsen, Inga E. Clark, Glenn Guntenspergen, Don Cahoon, Vincent Caruso, Cliff Hupp, Tom Yanosky
Seasonal methane emissions by diffusion and ebullition from oligohaline marsh environments in coastal Louisiana
Methane is an important atmospheric greenhouse gas that is emitted from many natural and anthropogenic sources. In order to evaluate the global methane budget, precise data are needed from the diverse sources including coastal wetlands. Over 100 time-series determinations of methane emissions from an oligohaline wetland (brackish marsh) in coastal Louisiana show large variability during five seaso
Authors
Joel S. Leventhal, Glenn R. Guntenspergen
Differences in distribution of modified basins and ducks relative to roadside transects
Wetland basins in the Prairie Pothole Region of the U.S. are commonly modified by excavation (e.g., roadside ditches, stock dugouts), partial drainage (ditching), and diking. Differences in the distribution of modified wetlands may affect the predictive accuracy of waterfowl survey data if such wetlands are not distributed randomly in the landscape and if waterfowl are not distributed equally am
Authors
Jane E. Austin, Glenn R. Guntenspergen, H. Thomas Sklebar, T.K. Buhl
Preface: Phragmites australis: A sheep in wolf's clothing?
A. problem with national priorities for control or prevention of aquatic nuisance species is that we often do not know the full extent of the problem, if there is one. To address this issue, we hosted a technical forum and workshop-Phragmites australis: A Sheep in Wolf's Clothing?--with a focus on new research and critical reviews that address the role of Phragmites as a noxious weed. ... The Wor
Authors
M.P. Weinstein, J.R. Keough, G.R. Guntenspergen, S.Y. Litvin
An integrated analysis of the effects of past land use on forest herb colonization at the landscape scale
A framework that summarizes the direct and indirect effects of past land use on forest herb recolonization is proposed, and used to analyse the colonization patterns of forest understorey herbaceous species in a 360-ha mixed forest, grassland and arable landscape in the Dijle river valley (central Belgium).Fine-scale distribution maps were constructed for 14 species. The species were mapped in 15
Authors
K. Verheyen, Glenn R. Guntenspergen, B. Biesbrouck, M. Hermy
Preface: Phragmites australis - A Sheep in Wolf's Clothing?
[No abstract available]
Authors
M.P. Weinstein, J.R. Keough, G.R. Guntenspergen, S.Y. Litvin
Narrowing historical uncertainty: probabilistic classification of ambiguously identified tree species in historical forest survey data
Historical data have increasingly become appreciated for insight into the past conditions of ecosystems. Uses of such data include assessing the extent of ecosystem change; deriving ecological baselines for management, restoration, and modeling; and assessing the importance of past conditions on the composition and function of current systems. One historical data set of this type is the Public L
Authors
D.J. Mladenoff, S.E. Dahir, E.V. Nordheim, L.A. Schulte, G.R. Guntenspergen
Indicators of wetland condition for the Prairie Pothole Region of the United States
We describe a study designed to evaluate the performance ofwetland condition indicators of the Prairie Pothole Region (PPR)of the north central United States. Basin and landscape scaleindicators were tested in 1992 and 1993 to determine theirability to discriminate between the influences of grasslanddominated and cropland dominated landscapes in the PPR. Pairedplots were selected from each of the
Authors
Glenn R. Guntenspergen, S.A. Peterson, S.G. Leibowitz, L.M. Cowardin
Duck populations as indicators of landscape condition in the Prairie Pothole Region
The Prairie Pothole Region of the northern Great Plains is an important region for waterfowl production because of the abundance of shallow wetlands. The ecological significance of the region and impacts from intensive agriculture prompted the U.S. Environmental Protection Agency to select it as one of the first areas for developing and evaluating ecological indicators of wetland condition. We exa
Authors
Jane E. Austin, Thomas K. Buhl, Glenn R. Guntenspergen, Wayne Norling, H. Thomas Sklebar